User Manual

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GX1600/GX1700

9.6 GROUP CALL

This feature allows the user to contact a group of specic vessels (example

members of a yacht club) using DSC radios with group call function to auto-

matically switch to a desired channel for voice communications. This func-

tion is very useful for yacht clubs and vessels traveling together that want

to collectively make announcements on a predetermined channel. Up to 32

group MMSI may be programmed.

9.6.1 Setting up the Group Call

For this function to operate, the same group MMSI must be programmed

into all the DSC VHF radios within the group of vessels that will be using this

feature. To understand group MMSI programming, rst a ship MMSI has to

be understood.

Ship MMSI: The rst three digits called a MID (Mobile Identity Group) of a

ship MMSI denote the country the ship registered for a MMSI. The last 6

digits are specic to the ships ID.

Ship MMSI Example: If your MMSI is “366123456”, “366” is MID which

denote the country and “123456” is your ships MMSI.

Group MMSI:



Group MMSI numbers are not assigned by the FCC or other organiza-

tions licensed to assign ship MMSI numbers.



The rst digit of a group MMSI is always set to “0” by the international

rules. All Standard Horizon radios are preset so when programming a

group MMSI the rst digit is set to “0”.



The USCG recommends programming the MID of a ships MMSI into the

second, third and fourth digits of the group MMSI as it denotes the area

the ship is located in.



The last 5 digits are decided upon by persons in the group. This is an

important step as all radios in the group must contain the same group

MMSI so they can be contacted by each other. There is a chance that

another group of vessels may program in the same group MMSI. If this

happens, simply change one or more of the last 5 digits of the group

MMSI.

1. Press and hold the

key until “

Setup

” appears.

-Setup Menu-

CH Function Setup

DSC Setup

GPS Setup

MMSI Setup

Waypoint Setup

GENERAL SETUP

QUIT

SELECT

-Setup Menu-

CH Function Setup

GPS Setup

MMSI Setup

Waypoint Setup

QUIT

SELECT

General Setup

DSC SETUP

2. Press the / key to select “

DSC

SETUP

” menu.

3. Press the

soft key, then select “

GROUP